• Plug is for plugging un-used Dk-Lok port.
• Remove the nut and ferrules from the Dk-Lok port.
• Finger-tighten the plug.
• Tighten the plug 1/4 turn beyond the finger-tight position, keeping the fitting body steady with a backup wrench.

** Do not tighten 1 1/4 turns as this has machined ferrule not the standard ferrules.

** Tighten 1/8 turn for 1/16, 1/8, and 3/16 in., 2, 3, and 4 mm tube fittings.